Thresholds (#222)

* add threshold blocks

* updated strings

* added gap

* reorg color/gyro blocks

* fixing sound names

* adding stop block

* fixing exanmples

libs/infrared-sensor/ir.ts

@@ -250,6 +250,21 @@ namespace sensors {
             this._setMode(IrSensorMode.Seek)
             return this.getNumber(NumberFormat.UInt16LE, this.channel * 2)
         }
+
+
+        /**
+         * Sets a threshold value
+         * @param condition the dark or bright light condition
+         * @param value the value threshold
+         */
+        //% blockId=irSetThreshold block="set %condition|to %value"
+        //% group="Threshold" blockGap=8
+        setThreshold(condition: InfraredSensorEvent, value: number) {
+            if (condition == InfraredSensorEvent.ObjectNear)
+                this.proximityThreshold.setLowThreshold(value)
+            else
+                this.proximityThreshold.setHighThreshold(value);
+        }
     }
 
     //% fixedInstance whenUsed block="infrared 1" jres=icons.port1